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The Microbes We're Made Of
The human body hosts more than ten thousand different kinds of microbes. Most of these bacteria aren't harmful - in fact, many of them actually aid the immune system (2:32)
Courtesy of: Smithsonian Channel
Featured Videos From the Smithsonian Channel
 The Healthy Truth About Traditional ChildbirthWhen a baby is born surgically via C-section, it may miss out on the health benefits of passing through the birth canal (2:15) |
 The Elephant WhispererCaitlin O'Connell has been studying the interactions of elephants for 20 years. (3:22) |
 Danger at the Watering HoleElephant families clash over access to the best spot at the watering hole (2:54) |
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